The break-up happened shortly after Casper was exposed as allegedly flirting with transsexual model Sofie Vissa, although the couple insisted they'd actually separated two months earlier.

Now, it's been suggested the split could be down to Jen's fixation with keeping her famously bootylicious bod in shape.

Splash

Did Casper grow tired of Jen's strict diet and fitness routines?

"Jennifer’s obsession with her own body is out of control. There’s no doubt she’s worked herself into the ground to achieve her killer shape," a source told Radaronline.

"In the end, Jen and Casper had nothing else to talk about except diet and exercise stuff, and that was exactly how she wanted it. Jennifer used to love talking about fashion and movies with her girlfriends, but now it’s 'this cleanse,' 'that workout routine.' She’s like a fitness robot who has nothing else in her life!"

And it seems that her single-minded quest for the perfect body means that men are taking a back seat.

“It’s no exaggeration to say that Jen is obsessed with her body and, other than her kids, nothing else comes even close to being as important to her as staying in shape," the source said.

Rex

Jen showed off her gorgeous body at the World Cup opening ceremony

Jen, 44, who is understood to follow a strict portion-controlled diet and undertake rigorous 90-minute workouts, has admitted in the past that she works hard to stay in such great shape.

“I’ve worked out my whole life and I’ve been incredibly disciplined when I needed to be," she told Glamour magazine.